"The condition for pulling back heavy arms from the conflict area is the fulfillment of the first point in the Minsk agreements, that is a ceasefire," Ukrainian military spokesman Andriy Lysenko said during a briefing in Kiev.
The ceasefire between Ukraine's government troops and independence supporters came into force Sunday.
Lysenko said that there had been 112 occurrences of gunfire since the ceasefire came into effect, which "is not a sign of a ceasefire."
The ceasefire was agreed at the February 12 marathon talks in Minsk between the leaders of Ukraine, France, Germany and Russia. Under the deal, the warring sides must withdraw heavy artillery from the line of contact within two weeks.
On Sunday afternoon, the head of the Organization for Security and Co-operation in Europe (OSCE) Special Monitoring Mission (SMM) to Ukraine Ertugrul Apakan said that the truce was generally holding.
